While in Germany we met with a couple of families in Berlin who both have kids with CG. I understand that families are urged to include aged cheeses in their diet thus eliminating the need to supplement calcium. I saw the list of cheeses which was ok'd after new testing and it includes cheeses which have been aged for 6 weeks or longer. Interesting, isn't it?
For us, we allow our oldest to eat Parmesan Reggiano. This we only allow at home. She has been eating Parmesano Reggiano on a regular basis now for almost 6 months and her levels did not increase. Note also, that we do not adjust our diet in any way before the draw. I am very interested however to see whether it increases her calcium level in any way...